Which of the Following Terms Best Refers to the Fact

Multiple Choice

Which of the following terms best refers to the fact that the benefit to a firm from being a monopolist as compared with being one of two competitors in a duopoly is greater than the benefit to a firm from being a duopolist as compared with not being in the industry at all?

A) The replacement effect
B) Competitive effect
C) Efficiency effect
D) Hypercompetition
E) The sunk cost effect